Malicious PDF — malware analysis report

Static analysis result for SHA-256 33c2cdc17255c7e1…

MALICIOUS

PDF

87.6 KB Created: 2021-06-12 15:10:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aeaccb9b35e5374a133e37229a398cc3 SHA-1: de51a35f86424001c1d70547afafbe140e39b9f9 SHA-256: 33c2cdc17255c7e16b57628b367c915d4a5cd06355c229ba1e29c6d952eee97e
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm or SEO manipulation tactic. The document body, though heavily obfuscated, contains keywords related to downloading a religious text, likely a lure to drive traffic to these external sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or ad fraud.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://drafthe.ru/pbw?utm_term=namaz+ki+kitab+pdf+free+download
    • https://zafuzumu.weebly.com/uploads/1/3/4/6/134674349/9819424.pdf
    • https://xilazugalalurid.weebly.com/uploads/1/3/4/6/134685369/dimawod_sabinofe_jivobobo_wabej.pdf
    • https://lufotoloxa.weebly.com/uploads/1/3/4/3/134318907/ab883423f123b5.pdf
    • https://static.s123-cdn-static.com/uploads/4393762/normal_5fc9b27a3d0cc.pdf
    • https://static.s123-cdn-static.com/uploads/4484812/normal_5fc80ad9700cc.pdf
    • https://majabowuji.weebly.com/uploads/1/3/6/0/136092793/gegamegemis.pdf
    • https://napuguzexavuzes.weebly.com/uploads/1/3/4/8/134875267/9342596.pdf
    • https://lemosipezo.weebly.com/uploads/1/3/5/3/135326275/f1c8d4e5f2.pdf
    • https://netajowazowu.weebly.com/uploads/1/3/4/3/134325029/ca15c8a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • http://nugurafuge.pbworks.com/w/file/fetch/144796026/ratatavodafezubemunux.pdf
    • http://fufitiruw.pbworks.com/w/file/fetch/144907257/a_level_biology_exam_questions_by_topic_ocr.pdf
    • http://kirozatijawu.pbworks.com/f/tagegujafetomek.pdf
    • http://lekuzax.pbworks.com/f/88967349002.pdf
    • http://nilanom.pbworks.com/w/file/fetch/144416133/gexanefodolotidise.pdf
    • http://zefavorase.pbworks.com/f/guximuxunonineb.pdf
    • http://bojifimaral.pbworks.com/w/file/fetch/144656166/how_do_i_recertify_for_snap.pdf
    • http://fuxedemama.pbworks.com/f/what_does_the_number_1233_mean.pdf
    • http://moxulolo.pbworks.com/w/file/fetch/144671718/8174564249.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eacb.bin
0c036be27b9cd7caea670d193e5823c7292c1e2da6775c7956594f7f204d2d44
pdf-font-stream PDF embedded font (sfnt) at offset 0xEACB 3032 bytes
font_01_sfnt_off0000f5a2.bin
88515c9430b2664a85aa8b4753b1212e0fcc9796bfa2ce64f2911c2474bba6fc
pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A2 5324 bytes
font_02_sfnt_off000107c8.bin
08e428065615b3a3069bed6bc2dccb4f318daf9fa9d15954d68eab61805e9948
pdf-font-stream PDF embedded font (sfnt) at offset 0x107C8 10652 bytes
font_03_sfnt_off00012c41.bin
c6958a73e626a9453b29f3dfa92361db0b0697d2d8bc5dfff225239159007780
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C41 16272 bytes
font_04_sfnt_off0001421e.bin
819c30fe8b0816c80dc9c416f237900d84452768c797e0752ba0344ae29d10db
pdf-font-stream PDF embedded font (sfnt) at offset 0x1421E 3972 bytes